Place fruit in a blender and blitz until smooth. Transfer to a small jug.
Step 2
Pour mixture equally into a 12-hole (1 tbs-/20ml-capacity) ice-cube tray and freeze for 6 hours or overnight until set.
Step 3
Transfer cubes to an airtight container and store in the freezer until required. (Once ready to use, place cubes in a blender with yoghurt and milk, then blitz until smooth.)